Is it possible to use a good alternator from an old car in a different car, as long as everything bolts up ?

My alternator went out in my 1992 Olds 98 Regency. I do have a good alt in my 1987 Cadillac DeVille, but the amps for both are 104-120 amps for the Olds, & 160 amps for the Caddy. Was hoping to be able to use the good one from the Caddy in the Olds.

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NachoMahma7 years ago
.  They are both GM and only 5 years apart, so there's a real good chance that it will work. If the electrical connection(s) is the same, you have an even better chance of success.
. The position of the pulley is important. Make sure the belt runs straight and true.
.  The "extra" amps are unimportant. The alternator will only put out as many amps as are called for.
.  I'm too lazy to do it, but you should be able to go to an online auto parts store and search for a 160A alternator for the Olds and a 160A for the Caddy. If the part numbers are the same, you're good to go.
.  And the pulleys need to be close to the same diameter. If too big, you may not have enough juice at idle. If too small, you may over-rev the alt.
They're both CS series alternators, so the electrical is the same.  At most, you'll only have to change the pulleys if they're a different size or don't have the same number of ribs.  If it bolts up the same, go for it.
kat49242 (author)  MahavishnuMan7 years ago
Great tip about the pulleys, hadn't thought about being able to switch them. Thanks!
Re-design7 years ago
Well they are both GM cars.
Do they have the same connections?  If so then it will probably be fine.
Acepilot427 years ago
dont youl short a circut